/Engine/Plugins/Runtime/Metasound/Source/MetasoundFrontend/Public/MetasoundFrontendController.h
Creates and inserts a new subgraph into this graph using the given metadata.Bycalling AsGraph() on the returned node handle, callers can modify the new subgraph.
Handle to the subgraph node. On error, the handle is invalid.
[FNodeHandle](API\Plugins\MetasoundFrontend\FNodeHandle) CreateEmptySubgraph ( const [FMetasoundFrontendClassMetadata](API\Plugins\MetasoundFrontend\FMetasoundFrontendClassMetadata) & InInfo )